Carrying a gun across state lines is legal for most gun owners, but only if you follow a specific federal transport rule and understand that actually carrying the firearm loaded on your person is a separate question governed by state permits and reciprocity. Federal law protects travelers who move an unloaded, locked firearm between two states where they can legally possess it. That protection does not let you carry the gun ready to use, and it does not override state bans on specific weapons, magazines, or ammunition once you stop and settle in.
The Federal Safe Passage Rule
The Firearm Owners Protection Act, codified at 18 U.S.C. § 926A, is the federal shield for interstate firearm transport. It says any person who isn’t federally prohibited from possessing a firearm may transport one from a state where possession is legal to another state where possession is legal, and no conflicting state or local law along the route can be used to prosecute them.1Office of the Law Revision Counsel. 18 U.S.C. 926A – Interstate Transportation of Firearms
Three conditions have to hold the entire time you’re in transit:
- You can lawfully possess and carry the firearm at both your origin and your destination.
- The firearm is unloaded, meaning no live round in the chamber, cylinder, or any inserted magazine.
- Neither the firearm nor the ammunition is directly accessible from the passenger compartment. In a car with a trunk, locking it in the trunk works. In an SUV, pickup, or hatchback with no separate trunk, the firearm and ammunition go in a locked container that is not the glove compartment or center console.1Office of the Law Revision Counsel. 18 U.S.C. 926A – Interstate Transportation of Firearms
The statute doesn’t define “unloaded” in exact terms, so store ammunition separately from the firearm to stay clearly within the rule.
Who Can’t Transport a Firearm at All
Before safe passage matters, you have to be someone federal law allows to possess a firearm in the first place. Under 18 U.S.C. § 922(g), people in certain categories are barred from shipping, transporting, possessing, or receiving any firearm or ammunition in interstate commerce, and no state permit or reciprocity agreement changes that.
The prohibited categories include anyone with a felony conviction (any crime punishable by more than one year, regardless of the sentence actually served), fugitives from justice, unlawful users of or addicts to controlled substances, people adjudicated mentally defective or committed to a mental institution, people unlawfully in the country or on most nonimmigrant visas, those dishonorably discharged from the Armed Forces, people who have renounced U.S. citizenship, those subject to a qualifying domestic restraining order, and anyone with a misdemeanor domestic violence conviction.2Office of the Law Revision Counsel. 18 U.S. Code 922 – Unlawful Acts People under felony indictment face a related bar: they can’t ship, transport, or receive firearms in interstate commerce while the indictment is pending.
When Safe Passage Stops Protecting You
FOPA is written for continuous travel, and courts have read the “continuous” part strictly. The leading decision is Revell v. Port Authority of New York and New Jersey from the Third Circuit. Gregg Revell was traveling from Utah to Pennsylvania with a checked, locked firearm. His connecting flight was cancelled, the airline returned his luggage, and he spent the night at a hotel near the airport. He was arrested the next morning under New Jersey firearm law.
The court held that Revell fell outside § 926A because he had access to his firearm during the overnight stay, whether or not he opened the case. The statute, the court wrote, “does not address this type of interrupted journey or what the traveler is to do in this situation.”3United States Court of Appeals for the Third Circuit. Revell v. Port Authority of New York and New Jersey, No. 09-2029
The practical rule: short stops for fuel or food during a drive-through generally stay within the protection. Checking into a hotel, staying overnight, or otherwise settling into a restrictive state does not. If your plans include an extended layover in a state with strict firearm laws, you face that state’s laws directly, with no federal safety net.
Carrying Loaded on Your Person: Permits and Reciprocity
Safe passage covers transport of an unloaded, locked firearm. It does not let you carry loaded on your person or in the passenger compartment. For that, you need either a concealed carry permit the destination state recognizes, or you need to be in a state that allows permitless carry and extends that right to visitors.
Reciprocity is the arrangement between states to honor each other’s permits. Some states recognize permits from nearly every other state; others accept few or none. These lists change with new legislation, so verify current reciprocity before every trip. Your home state’s attorney general or department of public safety usually maintains an up-to-date list.
One trap: some states honor a resident permit from your home state but refuse a non-resident permit issued to you by a third state. If you carry a non-resident permit, confirm your destination specifically accepts non-resident permits from the issuing state.
Permitless Carry States
Roughly 29 states have enacted some form of permitless carry, sometimes called constitutional carry, as of early 2026. Rules for non-residents vary. Some permitless carry states extend the right to any legal gun owner passing through; others limit permitless carry to their own residents and still require visitors to hold a recognized permit. Age thresholds also differ, and a state that lets its own residents carry at 18 may require non-residents to be 21. Even if permitless carry is available where you’re going, keeping a concealed carry permit from your home state is worth it: it preserves reciprocity elsewhere and can smooth traffic stops.
The Gun, Magazines, and Ammunition Themselves May Be Illegal
A permit doesn’t help if the firearm itself is banned at your destination. State and local laws restrict specific weapons and accessories independently of who is carrying them.
Ten states currently prohibit firearms classified as assault weapons, defined by physical features rather than by model name. Features that commonly trigger a ban on a semiautomatic rifle include a pistol grip, a folding or telescoping stock, a threaded barrel, or the ability to accept a detachable magazine in combination with other listed features. A rifle that is unremarkable in most of the country can be a felony to possess one state over.
Magazine capacity caps are another common trap, most often set at 10 or 15 rounds. A standard-capacity magazine that came with your handgun can produce criminal charges in a state with a limit, and some of these laws have no traveler exception even for a locked magazine in the trunk during an extended stop.
A few states also restrict specific ammunition. Hollow-point bullets, for example, are prohibited for general possession in at least one state, with narrow exceptions for home use, ranges, and hunting. Check destination-state ammunition rules before you pack.
Flying With a Firearm
Air travel follows TSA rules that apply everywhere in the country. Firearms are never allowed in carry-on bags or on your person aboard the aircraft. They travel only in checked baggage.4Transportation Security Administration. Transporting Firearms and Ammunition
To check a firearm:
- Declare it at the ticket counter each time you present the bag for transport.
- Pack it unloaded in a locked, hard-sided container that fully prevents access to the firearm.
- Keep the key or combination. Only you should be able to open the container, though TSA may ask you to open it for inspection.
Ammunition must be declared separately and packed in its original box or a container designed to hold ammunition (fiber, wood, plastic, or metal). It can go in the same locked hard-sided case as the firearm, but not loaded into the gun and not in a magazine inserted in the weapon. Loose magazines and clips must be boxed or placed inside the locked case.4Transportation Security Administration. Transporting Firearms and Ammunition
Bringing a firearm to a TSA checkpoint instead of checking it triggers civil penalties and a criminal referral. A loaded firearm at a checkpoint carries fines from $3,000 to $12,210 for a first offense, with repeat violations reaching up to $17,062. An unloaded firearm at a checkpoint runs $1,500 to $6,130.5Transportation Security Administration. Civil Enforcement Those are civil penalties, layered on top of any criminal charges the local state chooses to bring. And as Revell shows, landing safely doesn’t guarantee you’re clear under local law if a disruption forces you to collect luggage in a restrictive jurisdiction.
Amtrak and Intercity Buses
Amtrak accepts firearms in checked baggage only, at stations that offer checked baggage service. The firearm must be unloaded and in a locked, hard-sided container, and you must complete a declaration form at check-in. Every station on your itinerary has to offer checked baggage; if one doesn’t, you can’t bring a firearm on that trip. Firearms and ammunition are barred from carry-on entirely.6Amtrak. Firearms in Checked Baggage
Most major intercity bus carriers prohibit firearms outright. Greyhound bans all weapons from both carry-on and under-bus baggage with no exceptions.7Greyhound. Your Rights and Rules on Board Check the specific carrier if you must, but expect the answer to be no.
NFA Items Need ATF Approval First
If your firearm is registered under the National Firearms Act (a short-barreled rifle, short-barreled shotgun, machine gun, or destructive device), federal law adds a step that doesn’t apply to ordinary guns. Under 18 U.S.C. § 922(a)(4), transporting these items across state lines without prior written ATF authorization is illegal.2Office of the Law Revision Counsel. 18 U.S. Code 922 – Unlawful Acts
You file ATF Form 5320.20 before the trip and wait for approval. The form asks for your destination, travel dates, and details of the NFA item.8Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Transport Interstate or to Temporarily Export Certain National Firearms Act (NFA) Firearms Suppressors are exempt from the Form 5320.20 requirement, though they still have to comply with the laws of every state you enter.
National Parks and Federal Buildings
Since 2010, federal law has allowed firearm possession in areas managed by the National Park Service, so long as you comply with the firearm laws of the state where the park sits and aren’t otherwise prohibited.9Office of the Law Revision Counsel. 54 U.S. Code 104906 – Protection of Right of Individuals To Bear Arms If the park crosses state lines, the applicable law changes at the internal boundary.10U.S. National Park Service. Firearms in National Parks
Federal buildings inside parks (visitor centers, ranger stations, administrative offices) are still off-limits under 18 U.S.C. § 930, which bans firearms in any federally owned or leased building where federal employees regularly work. The same rule applies to post offices, courthouses, Social Security offices, and VA hospitals. Carrying into one is a federal misdemeanor punishable by up to a year in prison, or up to five years if the firearm was brought in with intent to commit a crime.11Office of the Law Revision Counsel. 18 U.S. Code 930 – Possession of Firearms and Dangerous Weapons in Federal Facilities Discharging a firearm in a park is also prohibited unless you’re hunting where federal statute specifically authorizes it.10U.S. National Park Service. Firearms in National Parks
Penalties for Getting It Wrong
Consequences swing hard depending on where you’re caught. Federal penalties for prohibited persons who possess firearms run up to 10 years in prison. But most travelers who get in trouble aren’t prohibited persons at all. They’re legal gun owners whose firearm, magazine, or ammunition violated the laws of the state they entered.
Some states treat unlicensed firearm possession as a serious felony with mandatory minimum prison time. In the most restrictive jurisdictions, possessing a handgun without the proper state license can carry multiple years, and prosecutors there rarely make exceptions for out-of-state travelers. A first offense can mean mandatory prison with no diversionary option.
The asymmetry is the whole problem: you can be a responsible, permitted owner at home and face a felony one state over for the exact same gun. Federal safe passage is the only nationwide protection, and its gaps are real. Before any trip, research every state on your route, not just your destination, and treat any stop longer than a fuel break as a point where local law fully applies.